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ADS7871IDBR Datasheet(PDF) 5 Page - Texas Instruments

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Part # ADS7871IDBR
Description  PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS7871IDBR Datasheet(HTML) 5 Page - Texas Instruments

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ADS7871
SLAS370C − APRIL 2002 − REVISED OCTOBER 2004
www.ti.com
5
ELECTRICAL CHARACTERISTICS
For Internal Functions (1), −40
°C ≤ TA ≤ 85°C, VDD = 5 V, BUFIN = 2.5 V (using external reference), 2.5-MHz CCLK and 2.5-MHz SCLK (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Multiplexer
On resistance
100
Off resistance
1
G
Off channel leakage
On channel = 5.2 V,
Off channel = 0 V
VLNx = 5.2 V
100
pA
Off channel leakage
current
On channel = 0 V,
Off channel = 5.2 V
100
pA
On channel leakage
On channel = 5.2 V,
Off channel = 0 V
100
pA
On channel leakage
current
On channel = 0 V,
Off channel = 5.2 V
100
pA
PGA Amplifier
Offset voltage
100
µV
Small signal bandwidth
5/Gain
MHz
Settling time
G = 1
0.3
µs
Settling time
G = 20
6.4
µs
Analog-To-Digital Converter DC Characteristics
Resolution
14
Bits
Integral linearity error
±2
LSB
Differential linearity error
±0.5
LSB
No missing codes
14
Bits
Offset error
REFIN = 2.5 V
±2
LSB
Full-scale (gain) error
±0.02
%
Common mode rejection, RTI of A/D
60
dB
Power supply rejection, RTI of ADS7871
External reference, VDD = 5 V ±10%
60
dB
PGA Plus A/D Converter Sampling Dynamics
fCCLK = 2.5 MHz, DF = 1
Throughput rate
50 CCLK cycles
50
kHz
Conversion time
14 CCLK cycles
5.6
µs
Acquisition time
28 CCLK cycles
9.6
µs
Auto zero time
8 CCLK cycles
3.2
µs
Aperture delay
36 CCLK cycles
12.8
µs
Small signal bandwidth
5
MHz
Step response
1 Complete Conversion Cycle
(1) The specifications for the total system are overall analog input to digital output specifications. The specifications for internal functions indicate
the performance of the individual functions in the ADS7871.


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